Henry Percy, 3rd Earl of Northumberland was born 25 July 1421 to Henry Percy, 2nd Earl of Northumberland (c1392-1455) and Eleanor Neville (1398-1472) and died 29 March 1461 Battle of Towton of unspecified causes. He married Eleanor Poynings (c1422-1484) 25 June 1435 JL .
Children
| Name | Birth | Death | Joined with |
| Ralph Percy (1440-) | |||
| Anne Percy (1444-1522) | |||
| Margaret Percy (1447-) | 1447 | William Gascoigne (c1450-1487) | |
| Henry Percy, 4th Earl of Northumberland (c1449-1489) | 1449 | 28 April 1489 | Maud Herbert (c1448-c1485) |
| Elanor Percy (1455-) | |||
| Elizabeth Percy (1460-1512) | 1460 | 1512 | Henry Scrope, 6th Baron Scrope of Bolton (c1468-1506) |
| Mary Percy (c1461-) | |||
Footnotes (including sources)
| ‡ General |
| ₪ Wedding |
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